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稳扎稳打Silverlight(30) - 2.0Tip/Trick之Silverlight.js, Silverlight.supportedUserAgent.js

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稳扎稳打Silverlight(30) - 2.0Tip/Trick之Silverlight.js, Silverlight.supportedUserAgent.js, 自定义启动界面, 响应鼠标滚轮事件

介绍

Silverlight 2.0 提示和技巧系列

Silverlight.js - 一些 js 帮助函数,用于嵌为入 Silverlight 插件以及自定义安装体验等提供帮助

Silverlight.supportedUserAgent.js - 就一个函数,用于判断 Silverlight 是否支持用户的浏览器

自定义启动界面 - 三个参数的综合应用:splashScreenSource, onSourceDownloadProgressChanged, onSourceDownloadComplete 

响应鼠标滚轮事件 - 响应并处理鼠标的滚轮事件

在线DEMO

示例

1、Silverlight.js 和 Silverlight.supportedUserAgent.js 的常用函数的演示和说明

SilverlightDotJsDemo.html

&lt;!-- 

详解 Silverlight.js    

Silverlight.js - 一些 js 帮助函数,用于嵌为入 Silverlight 插件以及自定义安装体验等提供帮助,其最新版本在如下地址下载 

http://code.msdn.microsoft.com/silverlightjs 

Silverlight.supportedUserAgent.js - 就一个函数,用于判断 Silverlight 是否支持用户的浏览器,其最新版本在如下地址下载 

http://code.msdn.microsoft.com/SLsupportedUA 

--&gt; 

&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; 

&lt;html xmlns="http://www.w3.org/1999/xhtml"&gt; 

&lt;head&gt; 

        &lt;title&gt;Silverlight.js&lt;/title&gt; 

        &lt;script type="text/javascript" src="../Silverlight.js"&gt;&lt;/script&gt; 

        &lt;script src="../Silverlight.supportedUserAgent.js" type="text/javascript"&gt;&lt;/script&gt; 

&lt;/head&gt; 

&lt;body&gt; 

        &lt;div id="container"&gt; 

                &lt;a href="http://go.microsoft.com/fwlink/?LinkID=124807" style="text-decoration: none;"&gt; 

                        &lt;img src="http://go.microsoft.com/fwlink/?LinkId=108181" alt="Get Microsoft Silverlight" 

                                style="border-style: none" /&gt; 

                &lt;/a&gt; 

        &lt;/div&gt; 

        &lt;script type="text/javascript"&gt; 

                // Silverlight.createObject() - 生成一个嵌入了 Silverlight 插件的 object 元素 

                Silverlight.createObject( 

                        "../ClientBin/Silverlight20.xap", // .xap 的地址 

                        document.getElementById('container'), // 包含此 object 元素的父元素 

                        "slPlugin", // object 元素的 id 

                        { 

                                width: "100%", 

                                height: "100%", 

                                minRuntimeVersion: "2.0.31005.0" 

                        }, // Silverlight 插件的属性数组 

                                onLoad: onSLLoad, 

                                onError: onSLError, 

                                onSourceDownloadComplete: onSourceDownloadComplete 

                        }, // Silverlight 插件的事件处理程序数组 

                        "key1=value1,key2=value2", // 为 Silverlight 程序传递初始化参数(key=value的形式)。用“,”分隔 

                        "myContext" // 上下文信息,可以在插件的 onLoad 事件中获取 

                ); 

                function onSLLoad(plugin, userContext, sender) { 

                        alert(plugin.id + " - " + userContext + " - " + sender.toString()); 

                } 

                function onSLError(sender, args) { 

                        // args - Sys.UI.Silverlight.ErrorEventArgs 类型 

                        // ErrorEventArgs.errorType - 错误类型 

                        // ErrorEventArgs.errorMessage - 错误信息 

                        // ErrorEventArgs.errorCode - 错误代码 

                        // 程序 throw 出的异常可以在此处捕获到 

                        alert(args.errorType + "\n" + args.errorMessage + "\n" + args.errorCode); 

                function onSourceDownloadComplete(sender, args) { 

                        alert("SourceDownloadComplete"); 

                // Silverlight.createObjectEx(params) - 将所有参数放入一个数组中传入,其内部会解析这个数组中的参数,然后调用 Silverlight.createObject() 

                // Silverlight.default_error_handler = function (sender, args){} - onError 事件的默认处理程序,不需要的话可以将其置为 null 

        &lt;/script&gt; 

                window.onload = function() { 

                        // getSilverlight() - 尝试下载指定的版本,如果指定空字符串 "" 则为尝试下载最新版本 

                        // Silverlight.getSilverlight("2.0.31005.0"); 

                        // isInstalled() - 判断是否安装了指定的 Silverlight 版本 

                        alert(Silverlight.isInstalled("2.0.31005.0")); 

                        // Silverlight.onSilverlightInstalled - 使用 Silverlight.js 时,如果客户端没有安装 Silverlight 插件,则会自动安装,然后调用此方法以刷新浏览器,可以重写此方法以自定义行为(比如在此通过 createObject() 来使新安装的插件生效,而无需刷新)。注意:如果是 Silverlight 升级,则不会调用此方法,必须重启浏览器(只刷新是不行的) 

                        // supportedUserAgent(version, userAgent) - 判断 Silverlight 是否支持用户的浏览器,省略 userAgent 则为当前浏览器 

                        alert(Silverlight.supportedUserAgent("2.0")); 

&lt;/body&gt; 

&lt;/html&gt;

2、自定义 Silverlight 程序的启动界面,并显示加载进度

启动界面的 xaml 文件

SplashScreen.xaml

&lt;Grid xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    

            xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 

            Background="Bisque" 

&gt; 

        &lt;StackPanel Orientation="Horizontal" HorizontalAlignment="Center" VerticalAlignment="Center"&gt; 

                &lt;TextBlock Text="Loading" Margin="3" /&gt; 

                &lt;TextBlock x:Name="percent" Text="0%" Margin="3" /&gt; 

        &lt;/StackPanel&gt; 

&lt;/Grid&gt;

Silverlight 程序全部加载完成前,显示启动界面并显示加载进度

SplashScreen.html

        &lt;title&gt;SplashScreen&lt;/title&gt; 

        &lt;style type="text/css"&gt; 

                html, body 

                { 

                        height: 100%; 

                        overflow: auto; 

                body 

                        padding: 0; 

                        margin: 0; 

                #silverlightControlHost 

        &lt;/style&gt; 

        &lt;div id="silverlightControlHost"&gt; 

                &lt;object id="xaml1" data="data:application/x-silverlight-2," type="application/x-silverlight-2" 

                        width="100%" height="100%"&gt; 

                        &lt;param name="source" value="../ClientBin/Silverlight20.xap" /&gt; 

                        &lt;!--下载 source 指定的 xap 的过程中所显示的 xaml 的地址--&gt; 

                        &lt;param name="splashScreenSource" value="SplashScreen.xaml" /&gt; 

                        &lt;!--下载 source 指定的 xap 的过程中所持续调用的事件--&gt; 

                        &lt;param name="onSourceDownloadProgressChanged" value="onSourceDownloadProgressChanged"/&gt; 

                        &lt;!--souce 指定的 xap 被完全下载后所触发的事件--&gt; 

                        &lt;param name="onSourceDownloadComplete" value="onSourceDownloadComplete" /&gt; 

                &lt;/object&gt; 

                &lt;iframe style='visibility: hidden; height: 0; width: 0; border: 0px'&gt;&lt;/iframe&gt; 

                function onSourceDownloadProgressChanged(sender, args) { 

                        // progress 属性 - 下载进度(0 - 1 之间) 

                        sender.findName("percent").Text = Math.round(args.progress * 10000) / 100 + "%";                         

                        sender.findName("percent").Text = "100%"; 

3、响应并处理鼠标的滚轮事件

Wheel.xaml

&lt;UserControl x:Class="Silverlight20.Tip.Wheel" 

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"    

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"&gt; 

        &lt;StackPanel&gt; 

                &lt;TextBox x:Name="lblMsg" /&gt; 

&lt;/UserControl&gt;

Wheel.xaml.cs

/* 

 * 如何响应鼠标滚轮事件,可以参看 Deep Zoom Composer 生成的 MouseWheelHelper.cs 

 */ 

using System; 

using System.Collections.Generic; 

using System.Linq; 

using System.Net; 

using System.Windows; 

using System.Windows.Controls; 

using System.Windows.Documents; 

using System.Windows.Input; 

using System.Windows.Media; 

using System.Windows.Media.Animation; 

using System.Windows.Shapes; 

using System.Windows.Browser; 

namespace Silverlight20.Tip 

        public partial class Wheel : UserControl 

        { 

                public Wheel() 

                        InitializeComponent(); 

                        this.Loaded += new RoutedEventHandler(Wheel_Loaded); 

                void Wheel_Loaded(object sender, RoutedEventArgs e) 

                        HtmlPage.Window.AttachEvent("DOMMouseScroll", OnMouseWheel); 

                        HtmlPage.Window.AttachEvent("onmousewheel", OnMouseWheel); 

                        HtmlPage.Document.AttachEvent("onmousewheel", OnMouseWheel); 

                private void OnMouseWheel(object sender, HtmlEventArgs args) 

                        args.PreventDefault(); 

                        double mouseDelta = 0; 

                        ScriptObject eventObj = args.EventObject; 

                        // Mozilla and Safari     

                        if (eventObj.GetProperty("detail") != null) 

                                mouseDelta = ((double)eventObj.GetProperty("detail")); 

                        } 

                        // IE and Opera        

                        else if (eventObj.GetProperty("wheelDelta") != null) 

                                mouseDelta = ((double)eventObj.GetProperty("wheelDelta")); 

                        // IE浏览器:mouseDelta == 120 向上滚动;mouseDelta == -120 向下滚动 

                        // FF浏览器:mouseDelta == -3 向上滚动;mouseDelta == 3 向下滚动 

                        lblMsg.Text += mouseDelta.ToString(); 

        } 

}

OK

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     本文转自webabcd 51CTO博客,原文链接:http://blog.51cto.com/webabcd/343939,如需转载请自行联系原作者